Delivering best-in-class performance with a new active bridge solution
Supports superior thermal characteristics and high efficiency compared to diodes for POE PD.

Fairchild is strengthening its GreenBridge™ active bridge quad MOSFET technology with the FDMQ8205, the first product in the next-generation GreenBridge series for security cameras, wireless access points, LED lighting, and various other Power over Ethernet (POE) devices.

Now, designers can leverage GreenBridge’s best-in-class Rdson performance, ultra-small form factor, and excellent thermal characteristics to lower temperatures and increase efficiency while reducing the size of the solution.

The next-generation GreenBridge series complies with the IEEE 802.3at standard and consumes up to 10 times less power than Schottky diodes. Thanks to these excellent thermal characteristics, designers can simplify product design, reduce BOM costs, and decrease PCB size by reducing or eliminating the heatsink.


"Managing heat effectively is always a critical issue in design, especially for the new generation of IoT devices requiring more than 25.5W of power," explained Suman Narayan, Vice President of Fairchild's Intelligent Power FET business unit . "Fairchild's latest GreenBridge series advanced MOSFET technology helps designers solve overheating problems while enabling them to achieve key design goals such as higher efficiency, guaranteed compliance, reduced overall size, and cost reduction."

In addition, since power and voltage must be maximized due to the input power limit of POE systems, the very low conduction loss of the GreenBridge series is also a significant advantage. Furthermore, thanks to the power conversion efficiency of optimized PowerTrench MOSFET technology, the GreenBridge series offers best-in-class Rdson performance with a conduction loss rate 47% lower than competing products.

The GreenBridge series is also small, making it ideal for next-generation POE-based architectures that require a reduction in size compared to the previous generation. Measuring just 4.5mm x 5mm, the GreenBridge product integrates four MOSFETs in a full-bridge connected MLP package, and despite its small size, it does not require an external driver, saving PCB space.